contiki/platform/native/cfs-coffee-arch.h
nvt-se d0a546b049 A long refactoring session yielded the following.
Technical changes:

* Factored out file specific information from the file descriptor
  structure into a new file structure.

  - Useful file metadata can be stored after the file is closed.
  - File descriptors become much smaller.
  - Significantly reduces the need to scan for the file end.

* Use correct types in all function signatures.
* Removed the directory cache.

Results:

* Enormous speed increase when opening cached files (10x-20x.)
* Multiple fd:s pointing to the same file have the correct semantics.
* About 100 bytes smaller ROM size.
* Slightly smaller static RAM size.
2009-02-08 17:08:13 +00:00

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3.0 KiB
C

/*
* Copyright (c) 2008, Swedish Institute of Computer Science
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*
*/
/**
* \file
* Coffee architecture-dependent header for the native platform.
* \author
* Nicolas Tsiftes <nvt@sics.se>
*/
#ifndef CFS_COFFEE_ARCH_H
#define CFS_COFFEE_ARCH_H
#include "contiki-conf.h"
#include "dev/xmem.h"
#define COFFEE_SECTOR_SIZE 65536UL
#define COFFEE_PAGE_SIZE 256UL
#define COFFEE_START COFFEE_SECTOR_SIZE
#define COFFEE_SIZE ((1024UL * 1024UL) - COFFEE_START)
#define COFFEE_PAGE_COUNT (COFFEE_SIZE / COFFEE_PAGE_SIZE)
#define COFFEE_PAGES_PER_SECTOR (COFFEE_SECTOR_SIZE / COFFEE_PAGE_SIZE)
#define COFFEE_NAME_LENGTH 16
#define COFFEE_DYN_SIZE 16384
#define COFFEE_MAX_OPEN_FILES 6
#define COFFEE_FD_SET_SIZE 8
#define COFFEE_LOG_DIVISOR 4
#define COFFEE_LOG_SIZE 8192
#define COFFEE_LOG_TABLE_LIMIT 256
#define COFFEE_DIR_CACHE_ENTRIES 16
#define COFFEE_WRITE(buf, size, offset) \
xmem_pwrite((char *)(buf), (size), COFFEE_START + (offset))
#define COFFEE_READ(buf, size, offset) \
xmem_pread((char *)(buf), (size), COFFEE_START + (offset))
#define COFFEE_ERASE(sector) \
xmem_erase(COFFEE_SECTOR_SIZE, COFFEE_START + (sector) * COFFEE_SECTOR_SIZE)
#define READ_HEADER(hdr, page) \
COFFEE_READ((hdr), sizeof (*hdr), (page) * COFFEE_PAGE_SIZE)
#define WRITE_HEADER(hdr, page) \
COFFEE_WRITE((hdr), sizeof (*hdr), (page) * COFFEE_PAGE_SIZE)
/* Coffee types. */
typedef int16_t coffee_page_t;
typedef int32_t coffee_offset_t;
#endif /* !COFFEE_ARCH_H */